
public class text2 {
	int[] a;
	public void guize(int n) {
		a = new int[n];
		a[0] = 1;
		a[1] = 1;
		for(int i = 2;i < n;i++) {
			a[i] = a[i-1]+a[i-1];
		}
		System.out.println(a[n-1]);
	}
}
